The search for Malaysia Airlines Flight 370

The search for a Malaysia Airlines flight that went missing on March 8 with 239 people aboard now involves 26 countries and an area slightly larger than the entire land mass of Australia.

Malaysia's government on Tuesday listed the countries and their ships or planes deployed in the so-called southern corridor, a vast 160,000 square nautical mile (550,000 square kilometre) area stretching from Indonesia to the southern Indian Ocean.